/**
 * @classDescription Marquee，可做图片导航，图片轮换
 * @dependence jQuery 1.3.2
 * @DOM
 *  	<div id="marquee">
 *  		<ul>
 *   			<li></li>
 *   			<li></li>
 *  		</ul>
 *  	</div>
 * @CSS
 *  	#marquee {width:200px;height:50px;overflow:hidden;}
 * @Usage
 *  	$('#marquee').marquee(options);
 * @options
 *		distance:200,//一次滚动的距离
 *		duration:20,//缓动效果，单次移动时间，越小速度越快，为0时无缓动效果
 *		time:5,//停顿时间，单位为秒
 *		direction: 'left',//滚动方向，'left','right','up','down'
 *		scrollAmount:1,//步长
 *		scrollDelay:20//时长，单位为毫秒
 *		isEqual:true,//所有滚动的元素长宽是否相等,true,false
 *		loop: 0,//循环滚动次数，0时无限
 *		btnGo:{left:'#goL',right:'#goR'},//控制方向的按钮ID，有四个属性left,right,up,down分别对应四个方向
 *		eventGo:'click',//鼠标事件
 *		controlBtn:{left:'#goL',right:'#goR'},//控制加速滚动的按钮ID，有四个属性left,right,up,down分别对应四个方向
 *		newAmount:4,//加速滚动的步长
 *		eventA:'mouseenter',//鼠标事件，加速
 *		eventB:'mouseleave',//鼠标事件，原速
 *		navId:'#marqueeNav', //导航容器ID，导航DOM:<ul><li>1</li><li>2</li><ul>,导航CSS:.navOn
 *		eventNav:'click' //导航事件
 */
(function($){

  $.fn.marquee = function(options){
    var opts = $.extend({},$.fn.marquee.defaults, options);
		
    return this.each(function(){
      var $marquee = $(this);//滚动元素容器
      var _scrollObj = $marquee.get(0);//滚动元素容器DOM
      var scrollW = $marquee.width();//滚动元素容器的宽度
      var scrollH = $marquee.height();//滚动元素容器的高度
      var $element = $marquee.children(); //滚动元素
      var $kids = $element.children();//滚动子元素
      var scrollSize=0;//滚动元素尺寸
      var _type = (opts.direction == 'left' || opts.direction == 'right') ? 1:0;//滚动类型，1左右，0上下
      var scrollId, rollId, isMove, marqueeId;
      var t,b,c,d,e; //滚动动画的参数,t:当前时间，b:开始的位置，c:改变的位置，d:持续的时间，e:结束的位置
      var _size, _len; //子元素的尺寸与个数
      var $nav,$navBtns;
      var arrPos = [];
      var numView = 0; //当前所看子元素
      var numRoll=0; //轮换的次数
      var numMoved = 0;//已经移动的距离

      //防止滚动子元素比滚动元素宽而取不到实际滚动子元素宽度
      $element.css(_type?'width':'height',10000);
      //获取滚动元素的尺寸
      var navHtml = '<ul>';
      if (opts.isEqual) {
        _size = $kids[_type?'outerWidth':'outerHeight']();
        _len = $kids.length;
        scrollSize = _size * _len;
        for(var i=0;i<_len;i++){
          arrPos.push(i*_size);
          navHtml += '<li>'+ (i+1) +'</li>';
        }
      }else{
        $kids.each(function(i){
          arrPos.push(scrollSize);
          scrollSize += $(this)[_type?'outerWidth':'outerHeight']();
          navHtml += '<li>'+ (i+1) +'</li>';
        });
      }
      navHtml += '</ul>';
			
      //滚动元素总尺寸小于容器尺寸，不滚动
      if (scrollSize<(_type?scrollW:scrollH)) return;
      //克隆滚动子元素将其插入到滚动元素后，并设定滚动元素宽度
      $element.append($kids.clone()).css(_type?'width':'height',scrollSize*2);
			
      //轮换导航
      if (opts.navId) {
        $nav = $(opts.navId).append(navHtml).hover( stop, start );
        $navBtns = $('li', $nav);
        $navBtns.each(function(i){
          $(this).bind(opts.eventNav,function(){
            if(isMove) return;
            if(numView==i) return;
            rollFunc(arrPos[i]);
            $navBtns.eq(numView).removeClass('navOn');
            numView = i;
            $(this).addClass('navOn');
          });
        });
        $navBtns.eq(numView).addClass('navOn');
      }
			
      //设定初始位置
      if (opts.direction == 'right' || opts.direction == 'down') {
        _scrollObj[_type?'scrollLeft':'scrollTop'] = scrollSize;
      }else{
        _scrollObj[_type?'scrollLeft':'scrollTop'] = 0;
      }
			
      if(opts.isMarquee){
        //滚动开始
        //marqueeId = setInterval(scrollFunc, opts.scrollDelay);
        marqueeId = setTimeout(scrollFunc, opts.scrollDelay);
        //鼠标划过停止滚动
        $marquee.hover(
          function(){
            clearInterval(marqueeId);
          },
          function(){
            //marqueeId = setInterval(scrollFunc, opts.scrollDelay);
            clearInterval(marqueeId);
            marqueeId = setTimeout(scrollFunc, opts.scrollDelay);
          }
          );
				
        //控制加速运动
        if(opts.controlBtn){
          $.each(opts.controlBtn, function(i,val){
            $(val).bind(opts.eventA,function(){
              opts.direction = i;
              opts.oldAmount = opts.scrollAmount;
              opts.scrollAmount = opts.newAmount;
            }).bind(opts.eventB,function(){
              opts.scrollAmount = opts.oldAmount;
            });
          });
        }
      }else{
        if(opts.isAuto){
          //轮换开始
          start();
					
          //鼠标划过停止轮换
          $marquee.hover( stop, start );
        }
			
        //控制前后走
        if(opts.btnGo){
          $.each(opts.btnGo, function(i,val){
            var $obj;
            if('string'==typeof val){
              $obj=$(val);
            }else{
              $obj=val;
            }
            $obj.bind(opts.eventGo,function(){
              if(isMove == true) return false;
              opts.direction = i;
              rollFunc();
              if (opts.isAuto) {
                stop();
                start();
              }
              return false;
            });
          });
        }
      }
			
      function scrollFunc(){
        var _dir = (opts.direction == 'left' || opts.direction == 'right') ? 'scrollLeft':'scrollTop';
				
        if(opts.isMarquee){
          if (opts.loop > 0) {
            numMoved+=opts.scrollAmount;
            if(numMoved>scrollSize*opts.loop){
              _scrollObj[_dir] = 0;
              return clearInterval(marqueeId);
            }
          }
          var newPos = _scrollObj[_dir]+(opts.direction == 'left' || opts.direction == 'up'?1:-1)*opts.scrollAmount;
        }else{
          if(opts.duration){
            if(t++<d){
              isMove = true;
              var newPos = Math.ceil(easeOutQuad(t,b,c,d));
              if(t==d){
                newPos = e;
              }
            }else{
              newPos = e;
              clearInterval(scrollId);
              isMove = false;
              return;
            }
          }else{
            var newPos = e;
            clearInterval(scrollId);
          }
        }
				
        if(opts.direction == 'left' || opts.direction == 'up'){
          if(newPos>=scrollSize){
            newPos-=scrollSize;
          }
        }else{
          if(newPos<=0){
            newPos+=scrollSize;
          }
        }
        _scrollObj[_dir] = newPos;
				
        if(opts.isMarquee){
          marqueeId = setTimeout(scrollFunc, opts.scrollDelay);
        }else if(t<d){
          if(scrollId) clearTimeout(scrollId);
          scrollId = setTimeout(scrollFunc, opts.scrollDelay);
        }else{
          isMove = false;
        }
				
      };
			
      function rollFunc(pPos){
        isMove = true;
        var _dir = (opts.direction == 'left' || opts.direction == 'right') ? 'scrollLeft':'scrollTop';
        var _neg = opts.direction == 'left' || opts.direction == 'up'?1:-1;

        numRoll = numRoll +_neg;
        //得到当前所看元素序号并改变导航CSS
        if(pPos == undefined&&opts.navId){
          $navBtns.eq(numView).removeClass('navOn');
          numView +=_neg;
          if(numView>=_len){
            numView = 0;
          }else if(numView<0){
            numView = _len-1;
          }
          $navBtns.eq(numView).addClass('navOn');
          numRoll = numView;
        }

        var _temp = numRoll<0?scrollSize:0;
        t=0;
        b=_scrollObj[_dir];
        //c=(pPos != undefined)?pPos:_neg*opts.distance;
        e=(pPos != undefined)?pPos:_temp+(opts.distance*numRoll)%scrollSize;
        if(_neg==1){
          if(e>b){
            c = e-b;
          }else{
            c = e+scrollSize -b;
          }
        }else{
          if(e>b){
            c =e-scrollSize-b;
          }else{
            c = e-b;
          }
        }
        d=opts.duration;
				
        //scrollId = setInterval(scrollFunc, opts.scrollDelay);
        if(scrollId) clearTimeout(scrollId);
        scrollId = setTimeout(scrollFunc, opts.scrollDelay);
      }
			
      function start(){
        rollId = setInterval(function(){
          rollFunc();
        }, opts.time*1000);
      }
      function stop(){
        clearInterval(rollId);
      }
			
      function easeOutQuad(t,b,c,d){
        return -c *(t/=d)*(t-2) + b;
      }
			
      function easeOutQuint(t,b,c,d){
        return c*((t=t/d-1)*t*t*t*t + 1) + b;
      }

    });
  };
  $.fn.marquee.defaults = {
    isMarquee:false,//是否为Marquee
    isEqual:true,//所有滚动的元素长宽是否相等,true,false
    loop: 0,//循环滚动次数，0时无限
    newAmount:3,//加速滚动的步长
    eventA:'mousedown',//鼠标事件，加速
    eventB:'mouseup',//鼠标事件，原速
    isAuto:true,//是否自动轮换
    time:5,//停顿时间，单位为秒
    duration:50,//缓动效果，单次移动时间，越小速度越快，为0时无缓动效果
    eventGo:'click', //鼠标事件，向前向后走
    direction: 'left',//滚动方向，'left','right','up','down'
    scrollAmount:1,//步长
    scrollDelay:10,//时长
    eventNav:'click'//导航事件
  };
	
  $.fn.marquee.setDefaults = function(settings) {
    $.extend( $.fn.marquee.defaults, settings );
  };
	
})(jQuery);

//滚动
(function($){
  $.fn.scrollBox = function(settings){
    var opts={
      pageNum:3,  //共多少页
      time:3000,  //滚动间隔时间
      distance:366 //滚动距离
    };
    opts=$.extend(opts, settings);
    return this.each(function(){
      this.opt=opts;
      var me=this;
      var _this=$(this);
      this.init=function(){
        var _str='<a class="cur"></a>';
        for(var i=1;i<me.opt.pageNum;i++){
          _str += '<a></a>';
        }
        _this.find('dt').prepend('<div class="list-pager"><div class="pager-num">'+_str+'</div><div class="pager-op"><a href="###" title="上翻" class="page-up" >上翻</a><a href="###" title="下翻" class="page-down" >下翻</a></div></div>');
	
        me._pic=_this.find('.slider');
        me._pageindex=1;
        me._pager=_this.find('.pager-num a');

        me._pager.bind('click',function(){
          me._pageindex=me._pager.index(this);
          _this.find('.page-down').trigger('click');
        })
        _this.find('.page-up').bind('click',function(){
          if(me._pageindex>1){
            me._pageindex--;
          }else{
            me._pageindex=me._pager.length;
          }
          me._pager.removeClass('cur').eq(me._pageindex-1).addClass('cur');
          me._pic.animate({
            scrollLeft:me.opt.distance*(me._pageindex-1)
          });
          me.stop();
          me.start();
          return false;
        })
        _this.find('.page-down').bind('click',function(){
          me.scroll()
          return false;
        })
        _this.find('.slider > ul').css({
          'width':'999em'
        });
        me._pic.mouseover(function(){
          me.stop();
        }).mouseout(function(){
          me.start();
        })
        me.start();
      }
      this.scroll=function(){
        if(me._pageindex<me._pager.length){
          me._pageindex++;
        }else{
          me._pageindex=1;
        }
        me._pager.removeClass('cur').eq(me._pageindex-1).addClass('cur');
        me._pic.animate({
          scrollLeft:me.opt.distance*(me._pageindex-1)
        });
        me.stop();
        me.start();
      }
      this.start=function(){
        me._si=setInterval(function(){
          me.scroll();
        },me.opt.time);
      }
      this.stop=function(){
        clearInterval(me._si);
      }
      this.init();
    });
  }
})(jQuery);












